To address a couple of questions, it sounds like you don't trust any one of those; and, yet, you are worried that if you try to use more than one, they may collide in some way that causes them not to work. The danger to your budget mentioned by anomie is yet another fear.
So, why not use a reliable open source solution that is documented and you can see how it works? Download the community edition of Zmanda Recovery Manager for MySQL
. You can use that to do both incremental and full backups of MySQL databases using standard MySQL tools. You can gain an understanding of what those tools are by looking at the Documentation for Database Backup Methods
You should gain familiarity with the tools you are using and confirm for yourself that they are working. Test them. Watch the files as you are using them. Test recovering a database with them. You will only trust tools when you are familiar with them and know for yourself that they are working.